Replacing an MMUMINI-LINK TN ETSI

OPERATING INSTRUCTIONS

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Copyright

© Ericsson AB 2009–2014. All rights reserved. No part of this document may bereproduced in any form without the written permission of the copyright owner.

Disclaimer

The contents of this document are subject to revision without notice due tocontinued progress in methodology, design and manufacturing. Ericsson shallhave no liability for any error or damage of any kind resulting from the useof this document.

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Contents

Contents

1 Introduction 1

2 Prerequisites 1

2.1 Safety Information 1

2.2 Required Tools and Equipment 1

2.3 Required Documentation 2

3 Flowchart 2

4 Replacing an MMU 5

4.1 Preparing a Site Visit 54.1.1 Identifying Current Hardware and Software 54.1.2 Checking Compatibility 54.1.3 Placing Files on an FTP Server 6

4.2 Preparing the NE on Site 64.2.1 Starting the Local FTP Server 64.2.2 Verifying the Software Upgrade Preferences 64.2.3 Upgrading the Software 7

4.3 Replacing the Hardware 74.3.1 Replacing an MMU2 B/C/D/E/F/H/K or an MMU3 A 7

4.4 Concluding Routines 94.4.1 Checking Active Alarms 94.4.2 Checking Current SBL 94.4.3 Handling Faulty Units 9

Reference List 11

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Prerequisites

1 Introduction

This instruction describes how to replace an MMU with a new MMU of thesame type, for example replacing a faulty MMU2 H with a new MMU2 H. Forinformation on how to upgrade an MMU, for example replacing an MMU2 B withan MMU2 H, see Upgrading MMU HW, Reference [12].

Hardware management is described in HW Management Overview, Reference[4].

2 Prerequisites

This chapter includes information about required preparations before performingany replacement of hardware.

2.1 Safety Information

Make sure that the information in the following documents has been understoodby the persons performing the procedures:

• Personal Health and Safety Information, Reference [7]

• System Safety Information, Reference [10]

• Supplementary Safety Information for MINI-LINK, Reference [9]

2.2 Required Tools and Equipment

The following tools and equipment are required when replacing a plug-in unit:

• ESD wrist strap

• Torx screwdriver TX8 (M3)

• New plug-in unit

• PC with MINI-LINK Craft installed and the electronic MINI-LINK TN CPIlibrary available (on-line or, when needed, off-line, locally downloaded)

• USB cable

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2.3 Required Documentation

Read through this document and make sure referenced documentation isavailable during the replacement process. Ensure this by having the electronicCPI library available on your PC. See Library Description on how to make itavailable. It is recommended to print out a copy of the MINI-LINK TN FailureReport, which can be found in Handling Faulty Equipment, Reference [3].

For a detailed description of the parameters mentioned in these instructions,see MINI-LINK Craft User Interface Descriptions, Reference [5].

3 Flowchart

The flowchart in this section describes the flow of the tasks needed to completethe replacing of the hardware.

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Flowchart

Figure 1 Main Flow

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Figure 2 Replacing the Hardware

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4 Replacing an MMU

4.1 Preparing a Site Visit

This section presents the preparations needed for a successful completion ofthe procedures in this instruction. All these preparations can be performed bothlocally and remotely.

4.1.1 Identifying Current Hardware and Software

To perform an inventory:

1. Access the NE and start MINI-LINK Craft by following the instructions inAccessing a Network Element, Reference [1].

2. In the Management Tree, right-click the NE.

3. Point to Tools, Software Upgrade and click Software Upgrade.

4. On the Software Upgrade page, confirm that the NE is running on theintended Software Baseline (SBL). Conforming Modules must be equalto yes. If Conforming Modules is equal to no, an upgrade is requiredlater on.

5. In the Management Tree, right-click the NE.

6. Point to Tools and click Inventory.

7. On the Inventory page, do the following:

• Identify the product numbers and R-states for the MMU and its software.

• Identify the product numbers and R-states of the existing radio units,both for the hardware units and their software.

4.1.2 Checking Compatibility

To check compatibility when replacing a MMU:

1. For the replacement unit, follow the instructions in the compatibilitydocument in the Planning folder.

2. The replacement unit requires a minimum level of SBL on the NE. Checkcompatibility between the R-state of the replacement unit and the currentSBL running on the NE, see the compatibility document in the Planningfolder.

3. If a later SBL is required, select which SBL to be used.

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4. Check compatibility between the MMU and the connected RAU:

• The software of RAUs consists of load modules that are not part ofthe SBL. The new MMU must be compatible with the load modules ofexisting RAUs. Check compatibility between the software on the newMMU and the software on the existing radio units in MINI-LINK RadioUnit Compatibility, Reference [6].

• If the new MMU is incompatible with the load modules of existingRAUs, the load modules of the existing RAUs must be upgraded.Select load modules according to MINI-LINK Radio Unit Compatibility,Reference [6].

4.1.3 Placing Files on an FTP Server

To place files on an FTP server:

1. If an upgrade of SBL is required, place the SBL files on a local FTP serverby following the instructions in Upgrading or Downgrading a SW Baseline,Reference [13].

4.2 Preparing the NE on Site

Follow the instructions in the following sections to prepare the NE on site.

4.2.1 Starting the Local FTP Server

To start the local FTP server:

1. Access the NE locally and start MINI-LINK Craft by following the instructionsin Accessing a Network Element, Reference [1].

2. On the Tools menu, click FTP Server.

3. On the FTP Server page, under Starting and Stopping, click Start tostart the FTP server.

4.2.2 Verifying the Software Upgrade Preferences

To verify the software upgrade preferences, perform the following steps:

1. In MINI-LINK Craft, in the Management Tree, right-click the NE.

2. Point to Tools , Software Upgrade and click Preferences.

3. On the Preferences page, make sure Version Control is enabled. IfVersion Control is disabled, it is recommended to perform an upgrade ofthe SBL to enable Version Control before replacing the HW. See Section4.2.3 on page 7 for more information on SBL upgrade. Version Controlcan be disabled manually but it cannot be enabled manually. An SBLupgrade is required to enable it.

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Note: Version Control checks if load modules comply to the activeSBL. If necessary, load modules are automatically upgraded ordowngraded to comply with the active SBL.

4.2.3 Upgrading the Software

To upgrade the software, do as follows:

1. If an upgrade of SBL is required, upgrade the SBL by following theinstructions in Upgrading or Downgrading a SW Baseline, Reference [13].

4.3 Replacing the Hardware

This section describes how to replace the hardware.

Note: The event Compliant software running is triggered when aplug-in unit with a software load module version that is later than thatin the current SBL has been inserted and accepted. This is displayedonly as information and requires no action from the user.

4.3.1 Replacing an MMU2 B/C/D/E/F/H/K or an MMU3 A

This procedure describes how to replace an MMU2 B, MMU2 C, MMU2 D,MMU2 E 155, MMU2 F 155, MMU2 H, MMU2 K, or an MMU3 A.

Caution!

Electrostatic Discharge (ESD) may damage the equipment. Always use anapproved ESD wrist strap to avoid damage to components fitted on printedcircuit boards.

To replace the unit:

1. If 1+1 protection is configured for the Radio Terminal, make sure all traffic ismoved from the modem being replaced to the other modem by performinga manual switch of Active MMU, Active TX and Active RX by means ofMINI-LINK Craft.

Note: The Active MMU command causes only a line switch activation. Itdoes not enable the complete MMU switching.

2. Press the BR button gently and release it. This is a request to take the unitOut of Service and all traffic related alarms will be disabled.

Note: The BR button should be pressed before the unit is removed, evenif the Power (green) LED is OFF.

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6148b

PowerBR

OFF ON Flashing

LEDSymbols

Figure 3 Pressing the BR Button

3. Wait until the BR (yellow) LED is ON. Disconnect the cables, undo thescrews on the latches and remove the unit within 10 minutes.

If the LED is not ON within 60 seconds, press and release the BR buttonagain. Wait another 60 seconds. If the LED is still not ON, remove theunit anyway.

Note: If the unit is not removed within 10 minutes, it is automatically takeninto service. Also, the unit can be taken into service before the endof the 10 by pressing the BR button again.

4. If XPIC is configured on an MMU2 F/H/K or an MMU3 A, connect the XPICcable to the new unit.

5. Insert the new unit. The unit will automatically be taken into service with theconfiguration used by the previous unit.

6. Tighten the two screws on the latches.

7. Connect the station radio cable.

8. Check if an XPIC recovery action is needed. See Troubleshooting,Reference [11]

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4.4 Concluding Routines

Perform the following concluding routines before leaving the site.

4.4.1 Checking Active Alarms

To check active alarms:

1. In MINI-LINK Craft, in the Management Tree, right-click the unit.

2. Click Alarms.

3. If alarms are active on the Alarms and Status page of the unit, performcorrective actions for each active alarm as described in Alarm Descriptions,Reference [2].

4.4.2 Checking Current SBL

To check Software Baseline (SBL):

1. In MINI-LINK Craft, in the Management Tree, right-click the NE.

2. Point to Tools, Software Upgrade and click Software Upgrade.

3. On the Software Upgrade page, identify the current SBL running on theNE.

4. If the current SBL is not the desired SBL, upgrade the SBL by following theinstructions in Upgrading or Downgrading a SW Baseline, Reference [13].

4.4.3 Handling Faulty Units

If the old unit was faulty, follow the instructions in Handling Faulty Equipment, Reference [3].

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Reference List

Reference List

[1] Accessing a Network Element, 3/1543-HRA 901 20-V11

[2] Alarm Descriptions, 5/1543-HRA 901 20-V11

[3] Handling Faulty Equipment, 1/1541-HRA 901 20-V11

[4] HW Management Overview, 5/1551-HRA 901 20-V11

[5] MINI-LINK Craft User Interface Descriptions, 7/1551-HRA 901 20-V11

[6] MINI-LINK Radio Unit Compatibility, 1/221 02-COH 901 536/1

[7] Personal Health and Safety Information, 124 46-2885

[8] Security Management Operations , 8/1543-HRA 901 20-V11

[9] Supplementary Safety Information for MINI-LINK, 124 46-HSD 101 16/1

[10] System Safety Information, 124 46-2886

[11] Troubleshooting, 5/154 43-HRA 901 20

[12] Upgrading MMU HW, 38/1543-HRA 901 20-V11

[13] Upgrading or Downgrading a SW Baseline, 12/1543-HRA 901 20-V11

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